Austin reached into his memory. “I had just looked through a skylight on the top of the structure when I got your call. There were people and machinery inside. I headed back to the sub. Then boom!”

“You said the structure was full of piping,” Zavala said. “Some of it would have been high-pressure conduits, hence the potential for explosion.”

“I don't know. There could have been a flaw in the piping, but this was a sophisticated operation. They would have had layers of safety valves and shutoffs to prevent a pressure buildup. From what I could see there was nothing out of the ordinary. Nobody was rushing around in a panic. No indication of any thing wrong.”

“What about the water temperature buildup?”

“Good question, although the satellite photos indicate this isn't the first time there has been a high-temperature water discharge into the cove, so it probably didn't have a direct link to the explosion.” Austin had brought a plastic bag with him. He opened it and produced the metal cylinder. “We found this floating in the cove. Any idea what it is?”

Contos examined the object and shook his head. “I'll try to track down the manufacturer when we get back to Washington.”

“Guess your instincts were right, Kurt. Remember, back at Hussong's, when you said you had the feeling a big bad-assed something was watching us.”

Austin's coral eyes hardened. “If you'll remember, I made an other astute observation.”

“What was that?”

“I said that whatever it is lurking in the shadows, the damned thing is as hungry as hell.”

“You two are spooky,” Contos said. “It sounds as if you're talking about Godzilla.”

Austin said nothing. He stared out at the bow cleaving the waves as if the answers to the questions whirling around in his head could be found beneath the blue-green of the sea.

NUMA 2 - Blue Gold

CHAPTER 12 THE HAND OF GOD

The airship glided over the rain forest like a huge, elongated Japanese lantern, pulsating with a soft blue-and-orange light as twin tongues of flame from the propane burners heated the air inside the big sausage-shaped envelope. Except for the occasional burner blast, the only evidence of the craft's existence was a silent shadow that blotted out the moon and stars like a passing cloud.

What Paul and Gamay thought to be a blimp was actually a thermal airship, an ingenious cross between a hot-air balloon and a dirigible. Hot-air burners provided lift, but unlike a balloon, which goes where the wind takes it, the thermal airship had an engine and could be steered under power. The more streamlined zeppelin silhouette had replaced the customary pear-shaped air bag known as the envelope. The envelope kept its shape with internal air pressure instead of a rigid blimp skeleton.

The Trouts sat side-by-side at the front of the aluminum frame gondola, held in their comfortable padded seats by full harnesses. From their perspective, slung under the belly of the envelope, the blimp looked enormous. The polyester fabric bag was one hundred feet long and half that in height. It had a full rudder at the back end for steering and large, thick fins for stability. Behind the passenger seats were the propane tanks that fueled the burners, the fuel containers for the Rotex two-stroke power plant, the engine itself, and the three-blade propeller that provided lateral thrust.